What is modification of root and stem?
Plant has different parts like root, stem and leaves. Each of them has a separate function to perform. However in special cases, roots may get modified to store food, help in respiration and provide support. Depending on the need and type of plant, the adventitious or tap roots may be modified.
What are the modifications of roots?
In some plants, the roots change their shape and get modified to absorb and transport water and minerals from the soil to different parts of the plant. They are also modified for support, food storage, and respiration. The root modifications perform two major functions- Physiological and Mechanical.
What are the major modifications of stem?
The stem modification that has enlarged fleshy leaves emerging from the stem or surrounding the base of the stem is called a bulb; it is also used to store food. Aerial modifications of stems include tendrils, thorns, bulbils, and cladodes..
Why are roots and stem modified?
The root in some plants get modified for storage of food modified for storage of food , mechanical support , and respiration respiration. The shoot system is differentiated into stem , leaves , flowers and into stem , leaves , flowers and fruits .
What are the modifications of roots give examples?
These modified roots usually are swollen and assume different forms such as spindle shaped, e.g., radish; top shaped, e.g., beet, turnip; conelike, e.g., carrot; indefinite shape, e.g., sweet potatoes (Fig. 7.1). Dahlia, Asparagus, Portulaca are some other examples of plants with modified roots for food storage.
What do roots do?
The roots anchor a plant, absorb water and minerals, and provide a storage area for food.
What are the modifications of roots give example?
What is underground modification of stem?
Underground stems are modified plants that derive from stem tissue but exist under the soil surface. They function as storage tissues for food and nutrients, propagation of new clones, and perennation (survival from one growing season to the next). Types include bulbs, corms, rhizomes, stolons, and tubers.
What is stem and its modification?
The stem is the plant axis that bears shoots, leaves, buds, and the basal end-roots. In some plants, the stem is modified to perform other functions such as storage of food, support, vegetative propagation, and protection. These are simply known as modified stems and can be categorized into various classes.
What are the different modifications and functions of a stem?
What are the characteristics of a modified stem?
These types of modified stems are partially aerial and partially underground. Their general characteristics are: They have short aerial branches. Adventitious roots develop to nodes. The node of the stem can grow into a fully developed plant. The plants are known as creepers.
How does a subaerial modification of a stem work?
II. Subaerial modifications of Stem: In subaerial modifications, the stem is partly aerial and partly underground. Short aerial branches and adventitious roots develop at the nodes. Detachment of entire branch or a node can develop into a new plant.
How are stem modifications used in vegetative propagation?
In subaerial modifications, the stem is partly aerial and partly underground. Short aerial branches and adventitious roots develop at the nodes. Detachment of entire branch or a node can develop into a new plant. The plants are commonly known as creepers and their subaerial stem modifications meant for vegetative propagation.
What are the functions of aerial stem modifications?
Aerial stem modifications have special functions such as protecting the plant, food storage, vegetative propagation, climbing, etc. Stem Tendrils: The stem of the plant or the branches are modified to green thread-like leafless structures known as tendrils and are used for climbing.